http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48743
--- Comment #2 from Joe Stroller <gcc.gnu.org at stellar dot eclipse.co.uk> 2011-04-23 21:14:26 UTC --- Created attachment 24086 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24086 Raw output from Todd Allen's cpuid utility Raw output also attached. I think the AMD document "AMD Processor Recognition Application Note" may also be relevant: http://support.amd.com/us/Processor_TechDocs/20734.pdf